
ECE 656 Lecture 23: Phonon Scattering I
10 Nov 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 About phonons
 Electronphonon coupling
 Energymomentum conservation
 Summary

ECE 656 Lecture 16: Solving the BTE: Magnetic Fields
09 Nov 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 General solution
 Current equation
 Coupled current equations
 Example
 Summary

ECE 656 Lecture 22: Charged Impurity Scattering
06 Nov 2009  Online Presentations  Contributor(s): Mark Lundstrom
Online:
 Review
 Screening
 BrooksHerring approach
 ConwellWeisskopf approach
 Discussion
 Summary / Questions

ECE 656 Lecture 18: Strong Magnetic Fields
05 Nov 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline
 Magnetoconductivity tensor
 Resistivity tensor
 Strong Bfields: Landau levels
 ShubnikovDeHaas Oscillations and QHE
 Summary

ECE 656 Lecture 19: Characteristic Times
05 Nov 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 Characteristic times
 Relaxation Time Approximation and τr

ECE 656 Lecture 20: Transmission and Backscattering
05 Nov 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 Transmission and mfp
 MFP and carrrier scattering
 Extracting meanfreepaths from experiments

ECE 656 Lecture 21: Scattering and Fermi's Golden Rule
05 Nov 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 Fermi’s Golden Rule
 Example: static potential
 Example: oscillating potential
 Discussion
 Summary

ECE 656 Lecture 14: Solving the BTE: 1D/RTA
07 Oct 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 The RTA
 Solving the BTE: drift
 Solving the BTE: diffusion
 Energydependent scattering time
 Relation to Landauer
 Discussion
 Summary

ECE 656 Lecture 11: Discussion
07 Oct 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 Ptype conductors and thermoelectrics
 ZT figure of merit
 Maximizing the “power factor”
 TE parameters for nondegenerate semiconductor

ECE 656 Lecture 15: Solving the BTE  General Solution for B = 0
06 Oct 2009  Online Presentations  Contributor(s): Mark Lundstrom
General solution
2) Current equation
3) Coupled current equations
4) The RTA
5) Summary

ECE 656 Lecture 17: BTE and Landauer
02 Oct 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 BTE review
 Transport Distribution
 Connection to Landauer
 Modes
 Meanfreepath
 Summary
This lecture is based on a recent paper, "On Landauer vs. Boltzmann and Full Band vs. Effective Mass Evaluation of Thermoelectric Transport Coefficients," by Changwook Jeong, a Ph.D. student at Purdue University. The paper is available at http://arxiv.org/abs/0909.5222
The author would also like to acknowledge several illuminating discussions with Prof. S. Datta.

ECE 656 Lecture 10: The DriftDiffusion Equation
30 Sep 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 Transport in the bulk
 The DD equation
 Indicial notation
 DD equation with Bfield

ECE 656 Lecture 9: Coupled Current Equations
28 Sep 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 Onsager relations
 Measurement considerations
 Thermoelectric devices

ECE 656 Lecture 8: Thermoelectric Effects
27 Sep 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 Introduction
 One energy level formulation
 Distribution of energy levels
 Discussion
 Summary
The author would like to thank Ms. Raseong Kim and Mr. Changwook Jeong for their many contributions to this lecture.

ECE 656 Lecture 7: 2 and 3D Resistors
27 Sep 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 Another view of the same problem
 2D resistors
 Discussion
 3D resistors
 Summary

Lecture 6: Graphene PN Junctions
22 Sep 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 Introduction
 Electron optics in graphene
 Transmission across NP junctions
 Conductance of PN and NN junctions
 Discussion
 Summary
Network for Computational Nanotechnology,
Intel Foundation

ECE 656 Lecture 13: Solving the BTE: equilibrium and ballistic
22 Sep 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 Quick review
 Equilibrium BTE
 Ballistic BTE
 Discussion
 Summary

Introductory Comments
22 Sep 2009  Online Presentations  Contributor(s): Mark Lundstrom

Lecture 3: Low Bias Transport in Graphene: An Introduction
18 Sep 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
Introduction and Objectives
Theory
Experimental approach
Results
Discussion
Summary
Lecture notes are available for this lecture.

ECE 656 Lecture 12: Boltzmann Transport Equation
18 Sep 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 Introduction
 Semiclassical electron dynamics
 Boltzmann Transport Equation (BTE)
 Scattering
 Discussion
 Summary

ECE 656 Lecture 6: Discussion
18 Sep 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline
 Quantum confinement and effective mass
 Bulk 1D transport and mfp
 Periodic vs. Box boundary conditions
 Thermal velocities
 "Ballistic mobility"

ECE 656 Lecture 5: 1D Resistors
14 Sep 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 Review
 1D ballistic resistors
 1D diffusive resistors
 Discussion
 Summary

ECE 656 Lecture 4: Density of States  Density of Modes
14 Sep 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 Density of states
 Example: graphene
 Density of modes
 Example: graphene
 Summary

ECE 656 Lecture 3: General Model for Transport
03 Sep 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 General model for lowfield transport
 Modes
 Transmission
 Linear (near equilibrium) transport
 Summary

ECE 656 Lecture 2: Sums in kspace/Integrals in Energy Space
01 Sep 2009  Online Presentations  Contributor(s): Mark Lundstrom
Outline:
 Density of states in kspace
 Example
 Working in energy space
 Discussion
 Summary